Electrical Engineering Quiz 49
1 / 50
When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon____________?
2 / 50
In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?
3 / 50
Following energized winding of a D.C. machine should not be opened as it would produce high inductive voltage which may be dangerous to personnel and may cause its own insulation failure.
4 / 50
Iron losses in a D.C. machine are independent of variations in_____________?
5 / 50
Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________?
6 / 50
Which following is a two terminal three layer device?
7 / 50
If the temperature increases, the value of VCE_________________?
8 / 50
Power factor of the system is kept high__________?
9 / 50
Vacuum is created by which of the following ?
10 / 50
Which triggering is the most reliable____________?
11 / 50
In the common mode, _______________?
12 / 50
At series or parallel resonance, the circuit power factor is ________________?
13 / 50
The value of collector load RC in a transistor amplifier is _______________the output impedance of the transistor?
14 / 50
Which of the following could be lamina-proximately the thickness of laminations of a D.C. machine ?
15 / 50
Lenz?s law is a consequence of the law of conservation of__________?
16 / 50
In which of the following appUcations, direct current is absolutely essential ?
17 / 50
Which of the following is the major consideration to evolve a good design?
18 / 50
In a steam locomotive electric power is provided through_____________?
19 / 50
The final stage of a multistage amplifier uses______________?
20 / 50
The power MOSFET device is a___________?
21 / 50
Which of the following single-phase induction motors is generally used in time phonographs ?
22 / 50
At room temperature, an intrinsic semiconductor has_______________?
23 / 50
For 25 kV single phase system power supply frequency is_______________?
24 / 50
The absolute permittivity of free space is given by_____________?
25 / 50
A differential amplifier is invariably used in the i/p stage of all op-amps. This is done basically to provide the op-amps with a very high______________?
26 / 50
Which of the following motors is used in a situation where load increases with speed ?
27 / 50
The cooling section in the surface condenser__________?
28 / 50
When the field of a synchronous motor is under-excited, the power factor will be____________?
29 / 50
An amplifier has a power gain of 100. Its db gain is ________________?
30 / 50
In phase-shift control method the control is carried out by varying the of grid voltage
31 / 50
D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select this______________?
32 / 50
An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is______________?
33 / 50
If a 3-phase supply is given to the stator and rotor is short circuited rotor will move___________?
34 / 50
The insulating material should have____________?
35 / 50
With conventional hydrogen cooling it is possible to increase the rating of a single unit to___________?
36 / 50
Battery container should be acid resistance, therefore it is made up of___________?
37 / 50
Series capacitors are used to_________________?
38 / 50
The bar magnet has____________?
39 / 50
Which of the following protects a cable against mechanical injury___________?
40 / 50
Which of the following D.C. distribution system is the simplest and lowest in first cost ?
41 / 50
Which of the following component, in a steam power plant, needs maximum maintenance attention?
42 / 50
The input control parameter of a JFET is __________________?
43 / 50
Which of the following motor will have relatively higher power factor ?
44 / 50
A three point starter is considered suitable for______________?
45 / 50
Voltage dependent resistors are used_____________?
46 / 50
The material for armouring on cable is usually__________?
47 / 50
Internal resistance of ideal current source is ?
48 / 50
The angular displacement between two interconnected stations is mainly due to___________?
49 / 50
For germanium transistor amplifier, VCE should_______________for faithful amplification?
50 / 50
The formula __________ determines the number of electrons that can be accommodated in any level?
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